Texas Instruments provides a recommended PCB layout in the LM2842 datasheet, which includes a thermal pad connected to a copper plane on the PCB to dissipate heat. Additionally, it's recommended to use a 2-layer or 4-layer PCB with a solid ground plane to reduce thermal resistance.
To ensure accurate and stable output voltage, it's essential to follow the recommended capacitor selection and placement guidelines in the datasheet. Additionally, the input voltage should be well-regulated, and the output should be decoupled with a low-ESR capacitor. It's also recommended to use a quiet input voltage and to minimize noise coupling into the device.
Although the datasheet specifies a maximum input voltage of 15V, it's recommended to limit the input voltage to 12V to ensure reliable operation and to prevent damage to the device. Exceeding the maximum input voltage can cause the device to overheat or fail.
While the LM2842 can deliver up to 2A of output current, it's not recommended for high-current applications. The device is designed for low-to-moderate current applications, and excessive current can cause the device to overheat or fail. For high-current applications, consider using a more suitable regulator, such as the LM2675 or LM338.
To protect the device from overvoltage and undervoltage conditions, consider adding overvoltage protection (OVP) and undervoltage protection (UVP) circuits. These circuits can be implemented using external components, such as zener diodes and resistors, or using dedicated protection ICs, such as the TLV703 or TLV704.
LM2842YQMKX/NOPB datasheet
by Texas Instruments
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